RZW02.1-200-060 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RZW02.1-200-060 belongs to the RZW Braking Resistors series and has a power rating of 200 kW with a resistance of 2.0 Ohms. This braking resistor features IP20 protection, measures 1435 mm in height by 995 mm in width by 955 mm in depth, and weighs 265 kg. It has a ventilator rating of 3.5 kVA with a supply of 3-phase 400 V at 50 Hz.
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Product Description:
The RZW02.1-200-060 is a braking resistor assembly manufactured by Bosch Rexroth Indramat for the RZW Braking Resistors series. Installed on the DC link of compatible Indramat drive controllers, the unit converts regenerative electrical energy produced during rapid motor deceleration into heat, helping maintain the bus voltage within a safe operating range. This function supports controlled braking in conveying, machining, and packaging equipment where motors frequently return energy to the drive. The packaged, floor-mounted design allows the assembly to be installed beside a control cabinet without occupying internal panel space.
This model provides 200 kW of instantaneous absorption capacity, indicating the peak power that it can convert into heat during an active braking interval. The integrated resistor grid has a nominal resistance of 2.0 Ω, so the connected drive must limit discharge current to a permissible level. When several inverters share the assembly, the wiring arrangement may reduce the effective resistance to a minimum of 1.6 Ω, helping control the DC-link voltage across a larger bus system. Thermal cycling follows a 60% SD operating factor over a 120-second load cycle, permitting 72 seconds of conduction followed by at least 48 seconds of cooling. A thermal time constant of 100 s indicates how quickly the resistor element responds to changes in thermal load. These operating limits must be considered when configuring repetitive deceleration cycles and selecting the connected drive equipment.
Forced-air cooling removes heat from the resistor grid during operation and supports the permitted duty cycle. The axial fan section draws up to 3.5 kVA from a dedicated three-phase, 400 V, 50 Hz power source. Airflow passes over the finned surfaces to keep the housing temperature at a maximum of 80 °C under the stated operating conditions. The enclosure is rated IP20, protecting against accidental contact with live components while allowing ventilation in an electrical room. With an overall mass of 265 kg, the assembly requires a stable floor installation and secure anchoring. Its frame measures 995 mm wide, 955 mm deep, and 1,435 mm high, so the installation area must provide adequate airflow and access around the housing.
